Pharmacogenetic testing is a form of precision medicine, using your genes to personalize your care. D3Damon/E+ via Getty ImagesHave you ever wondered why certain medications don’t seem to work as well for you as they do for others? This variability in drug response is what pharmacogenomic testing hopes to explain by looking at the genes within your DNA. Pharmacogenomics, or PGx, is the study of how genes affect your response to medications. Genes are segments of DNA that serve as an instruction